M87.07 — Idiopathic aseptic necrosis of ankle, foot and toes
M87.07 is a non-billable header ICD-10-CM code for idiopathic aseptic necrosis of ankle, foot and toes. It cannot be billed on its own: choose one of the more specific child codes below.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Idiopathic aseptic necrosis of metatarsus, tarsus, and phalanges of toes
Excludes1 inherited from the categories above M87.07
These are not written on M87.07, but they bind it: a note on a category applies to every code beneath it. Billing M87.07 with anything listed here is a denial.
Risk adjustment
M87.07 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code history
M87.07 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead M87.07
9 child codes. Green means billable.
- M87.071Idiopathic aseptic necrosis of right ankle
- M87.072Idiopathic aseptic necrosis of left ankle
- M87.073Idiopathic aseptic necrosis of unspecified ankle
- M87.074Idiopathic aseptic necrosis of right foot
- M87.075Idiopathic aseptic necrosis of left foot
- M87.076Idiopathic aseptic necrosis of unspecified foot
- M87.077Idiopathic aseptic necrosis of right toe(s)
- M87.078Idiopathic aseptic necrosis of left toe(s)
- M87.079Idiopathic aseptic necrosis of unspecified toe(s)
Related codes at this level
Codes that share M87.0. If M87.07 is not quite right, the correct code is usually one of these.
- M87.00Idiopathic aseptic necrosis of unspecified bone
- M87.01Idiopathic aseptic necrosis of shoulder
- M87.02Idiopathic aseptic necrosis of humerus
- M87.03Idiopathic aseptic necrosis of radius, ulna and carpus
- M87.04Idiopathic aseptic necrosis of hand and fingers
- M87.05Idiopathic aseptic necrosis of pelvis and femur
- M87.06Idiopathic aseptic necrosis of tibia and fibula
- M87.08Idiopathic aseptic necrosis of bone, other site
- M87.09Idiopathic aseptic necrosis of bone, multiple sites
Questions about M87.07
- Is M87.07 a billable ICD-10-CM code?
- No. M87.07 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does M87.07 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Other osteopathies (M86-M90).
- What cannot be coded together with M87.07?
- M87.07 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M87.07 (M87) and apply to it just the same.